1. Mattress Fabric: The mattress cover is made of skinfriendly knitted cotton fabric, with microfiber down filling in the middle layer, providing support when lying on the mattress. This ensures a more comfortable sleep experience. 2. Ergonomic Design: This mattress adapts to the human body structure and corrects the shape of traditional tatami mattresses for the cervical spine. It significantly improves sleep quality, alleviates most back pain caused by stiffness, enhances sleeping posture, and relaxes the spine for orthopedic benefits. 3. Usage Note: Please first airdry the floor mattress in the sun, as it will recover its shape faster under sunlight. Note that we compress the futon mattress into a storage bag for . Allow at least 23 days for it to fully restore its thickness. 4. Versatile Use: It can be used as a bedroom futon, living room futon, tatami mat, floor mat, sleeping floor mat, camping mat, guest mattress, or Japanesestyle bed mat. It also works as a play mat or floor cushion bed. Take it with you in your car when traveling—it's a companion for your family.